11,549 Matching Results

Search Results

Advanced search parameters have been applied.

Southern Great Plains cloud and radiation testbed site

Description: This document presents information about the Cloud and Radiation Testbed Site and the Atmospheric Radiation Measurement program. Topics include; measuring methods, general circulation methods, milestones, instrumentation, meteorological observations, and computing facilities.
Date: September 1, 1996
Partner: UNT Libraries Government Documents Department

Status of the database for solid breeder materials

Description: The databases for solid breeder ceramics (Li{sub 2}O, Li{sub 4}SiO{sub 4}, Li{sub 2}ZrO{sub 3} and LiAl0{sub 2}) and beryllium multiplier material were critically reviewed and evaluated as part of the ITER/CDA design effort (1988-1990). The results have been documented in a detailed technical report which includes progress made in expanding the solid breeder and beryllium databases up through September 1993. Emphasis was placed on the physical, thermal, mechanical, chemical-stability/compatibility, tritium retention/release and radiation stability properties which are needed to assess the performance of these materials in a fusion reactor environment. Materials properties correlations were selected for use in design analysis, and ranges of input parameters (e.g., temperature, porosity, etc.) were established. The need for updating the ceramic breeder database was discussed at the Third Ceramic Breeder Blanket Interactions (CBBI-3) workshop at UCLA in June 1994. Progress made in expanding the ceramic breeder database and plans for updating the database are discussed.
Date: December 31, 1996
Partner: UNT Libraries Government Documents Department

Chemical research at Argonne National Laboratory

Description: Argonne National Laboratory is a research and development laboratory located 25 miles southwest of Chicago, Illinois. It has more than 200 programs in basic and applied sciences and an Industrial Technology Development Center to help move its technologies to the industrial sector. At Argonne, basic energy research is supported by applied research in diverse areas such as biology and biomedicine, energy conservation, fossil and nuclear fuels, environmental science, and parallel computer architectures. These capabilities translate into technological expertise in energy production and use, advanced materials and manufacturing processes, and waste minimization and environmental remediation, which can be shared with the industrial sector. The Laboratory`s technologies can be applied to help companies design products, substitute materials, devise innovative industrial processes, develop advanced quality control systems and instrumentation, and address environmental concerns. The latest techniques and facilities, including those involving modeling, simulation, and high-performance computing, are available to industry and academia. At Argonne, there are opportunities for industry to carry out cooperative research, license inventions, exchange technical personnel, use unique research facilities, and attend conferences and workshops. Technology transfer is one of the Laboratory`s major missions. High priority is given to strengthening U.S. technological competitiveness through research and development partnerships with industry that capitalize on Argonne`s expertise and facilities. The Laboratory is one of three DOE superconductivity technology centers, focusing on manufacturing technology for high-temperature superconducting wires, motors, bearings, and connecting leads. Argonne National Laboratory is operated by the University of Chicago for the U.S. Department of Energy.
Date: April 1, 1997
Partner: UNT Libraries Government Documents Department

Chemical Technology Division progress report, January 1, 1993--September 30, 1995

Description: This progress report presents a summary of the missions and activities of the various sections and administrative groups in this Division for this period. Specific projects in areas such as energy research, waste and environmental programs, and radiochemical processing are highlighted, and special programmatic activities conducted by the Division are identified and described. The administrative summary portion features information about publications and presentations of Chemical Technology Division staff, as well as a listing of patents awarded to Division personnel during this period.
Date: September 1, 1996
Partner: UNT Libraries Government Documents Department

An introduction to the ENDF formats

Description: The ENDF Evaluated Nuclear Data Formats are used all over the world to encode nuclear data evaluations for use in research and nuclear technology. This report is an introduction to the formats and how they are used in modern compilations of nuclear data.
Date: November 1, 1998
Partner: UNT Libraries Government Documents Department

International workshop on plasma-based neutron sources

Description: The workshop was devoted to discussion of the status and future directions of work on plasma-based neutron sources. The workshop presentations demonstrated significant progress in development of the concepts of these sources and in broadening the required data base. Two main groups of neutron source designs were presented at the workshop: tokamak-based and mirror-based. Designs of the tokamak- based devices use the extensive data base generated during decades of tokamak research. Their plasma physics performance can be predicted with a high degree of confidence. On the other hand, they are relatively large and expensive, and best suited for Volumetric Neutron Sources (VNSes) or other large scale test facilities. They also have the advantage of being on the direct path to a power- producing reactor as presently conceived, although alternatives to the tokamak are presently receiving serious consideration for a reactor. The data base for the mirror-based group of plasma sources is less developed, but they are generally more flexible and, with appropriate selection of parameters, have the potential to be developed as compact Accelerated Test Facilities (ATFs) as well as full-scale VNSes. Also discussed at the workshop were some newly proposed but potentially promising concepts, like those based on the flow-through pinch and electrostatic ion-beam sources.
Date: December 9, 1996
Partner: UNT Libraries Government Documents Department

Recommendations for a Department of Energy nuclear energy R and D agenda

Description: On January 14, 1997, the President requested that his Committee of Advisors on Science and Technology (PCAST) make ``recommendations ... by October 1, 1997 on how to ensure that the United States has a program that addresses its energy and environmental needs for the next century.`` In its report, Federal Energy Research and Development for the Challenges of the Twenty-First Century, the PCAST Panel stated that ``the United States faces major energy-related challenges as it enters the twenty-first century`` and links these challenges to national economic and environmental well-being as well as to national security. The Panel concluded that ``Fission belongs in the R and D portfolio.`` In conjunction with this activity, the DOE Office of Nuclear Energy, Science and Technology, together with seven of the national laboratories, undertook a study to recommend nuclear energy R and D responses to the challenges and recommendations identified by the PCAST Panel. This seven-laboratory study included an analysis of past and present nuclear energy policies, current R and D activities, key issues, and alternative scenarios for domestic and global nuclear energy R and D programs and policies. The results are summarized. Nuclear power makes important contributions to the nation`s well-being that can be neither ignored nor easily replaced without significant environmental and economic costs, particularly in an energy future dominated by global energy growth but marked by significant uncertainties and potential instabilities. Future reliance on these contributions requires continuing past progress on the issues confronting nuclear power today: safety, waste management, proliferation, and economics. A strong nuclear energy agenda will enable the U.S. government to meet its three primary energy responsibilities: (1) respond to current needs; (2) prepare the country for anticipated future developments; and (3) safeguard the country from unexpected future events.
Date: December 1, 1997
Partner: UNT Libraries Government Documents Department

Recommendations for a Department of Energy Nuclear Energy R and D Agenda Volume 2 Appendices

Description: The current US nuclear energy policy is primarily formulated as part of the nation`s overall energy policy. In addition, nuclear energy policy is impacted by other US policies, such as those for defense and environment, and by international obligations through their effects on nuclear weapons dismantlement and stewardship, continued reliance on space and naval nuclear power sources, defense waste cleanup, and on nuclear nonproliferation. This volume is composed of the following appendices: Appendix 1--Objectives of the Federal Government Nuclear Energy Related Policies and Research and Development Programs; Appendix 2--Nuclear Energy and Related R and D in the US; Appendix 3--Summary of Issues That Drive Nuclear Energy Research and Development; Appendix 4: Options for Policy and Research and Development; Appendix 5--Pros and Cons of Objectives and Options; and Appendices 6--Recommendations.
Date: December 1, 1997
Partner: UNT Libraries Government Documents Department

Study of space charge-dominated beam bunching and some aspects of SSF linac designs

Description: This report is made up from works under the Agreement 1083P0015-35 between Los Alamos National Laboratory and Moscow Radiotechnical Institute. There are five report parts. In the 1-st, 2-nd, and 3-d parts works on SCD-beam dynamics understanding were continued. In the 4-th and 5-th parts two conceptual linac designs were considered: for deutron linac with energy of 40 MeV and for proton linac with energy 1 GeV. The both linacs have focusing by superconducting solenoids (SSF linacs). The 1 GeV proton CW linac design is an extension of the design from.
Date: December 31, 1995
Partner: UNT Libraries Government Documents Department

Fusion materials semiannual progress report for the period ending December 31, 1996

Description: This is the twenty-first in a series of semiannual technical progress reports on fusion materials. This report combines the full spectrum of research and development activities on both metallic and non-metallic materials with primary emphasis on the effects of the neutronic and chemical environment on the properties and performance of materials for in-vessel components. This effort forms one element of the materials program being conducted in support of the Fusion Energy Sciences Program of the US Department of Energy. The other major element of the program is concerned with the interactions between reactor materials and the plasma and is reported separately. The report covers the following topics: vanadium alloys; silicon carbide composite materials; ferritic/martensitic steels; copper alloys and high heat flux materials; austenitic stainless steels; insulating ceramics and optical materials; solid breeding materials; radiation effects, mechanistic studies and experimental methods; dosimetry, damage parameters, and activation calculations; materials engineering and design requirements; and irradiation facilities, test matrices, and experimental methods.
Date: April 1, 1997
Partner: UNT Libraries Government Documents Department

Human genome program report. Part 2, 1996 research abstracts

Description: This report contains Part 2 of a two-part report to reflect research and progress in the US Department of Energy Human Genome Program from 1994 through 1996, with specified updates made just before publication. Part 2 consists of 1996 research abstracts. Attention is focused on the following: sequencing; mapping; informatics; ethical, legal, and social issues; infrastructure; and small business innovation research.
Date: November 1, 1997
Partner: UNT Libraries Government Documents Department

Terrestrial ecosystem responses to global change: A research strategy

Description: Uncertainty about the magnitude of global change effects on terrestrial ecosystems and consequent feedbacks to the atmosphere impedes sound policy planning at regional, national, and global scales. A strategy to reduce these uncertainties must include a substantial increase in funding for large-scale ecosystem experiments and a careful prioritization of research efforts. Prioritization criteria should be based on the magnitude of potential changes in environmental properties of concern to society, including productivity; biodiversity; the storage and cycling of carbon, water, and nutrients; and sensitivity of specific ecosystems to environmental change. A research strategy is proposed that builds on existing knowledge of ecosystem responses to global change by (1) expanding the spatial and temporal scale of experimental ecosystem manipulations to include processes known to occur at large scales and over long time periods; (2) quantifying poorly understood linkages among processes through the use of experiments that manipulate multiple interacting environmental factors over a broader range of relevant conditions than did past experiments; and (3) prioritizing ecosystems for major experimental manipulations on the basis of potential positive and negative impacts on ecosystem properties and processes of intrinsic and/or utilitarian value to humans and on feedbacks of terrestrial ecosystems to the atmosphere.
Date: September 1, 1998
Partner: UNT Libraries Government Documents Department

Identification and evaluation of alternatives for the disposition of fluoride fuel and flush salts from the molten salt reactor experiment at Oak Ridge National Laboratory, Oak Ridge, Tennessee

Description: This document presents an initial identification and evaluation of the alternatives for disposition of the fluoride fuel and flush salts stored in the drain tanks at the Molten Salt Reactor Experiment (MSRE) at Oak Ridge National Laboratory (ORNL). It will serve as a resource for the U.S. Department of Energy contractor preparing the feasibility study for this activity under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). This document will also facilitate further discussion on the range of credible alternatives, and the relative merits of alternatives, throughout the time that a final alternative is selected under the CERCLA process.
Date: August 15, 1996
Partner: UNT Libraries Government Documents Department

Oak Ridge National Laboratory Institutional Plan, FY 1997--FY 2002

Description: Three major initiatives are described, which are proposed to strengthen ORNL`s ability to support the missions of the Department: neutron science, functional genomics, and distributed computing at teraflop speeds. The laboratory missions, strategic plan, scientific and technical programs, enterprise activities, laboratory operations, and resource projections are also described.
Date: October 1996
Partner: UNT Libraries Government Documents Department

Nuclear weapon detection categorization analysis

Description: This statement of work is for the Proof of Concept for nuclear weapon categories utility in Arms control. The focus of the project will be to collect, analyze and correlate Intrinsic Radiation (INRAD) calculation results for the purpose of defining measurable signatures that differentiate categories of nuclear weapons. The project will support START III negotiations by identifying categories of nuclear weapons. The categories could be used to clarify sub-limits on the total number of nuclear weapons.
Date: December 1, 1997
Partner: UNT Libraries Government Documents Department

Calculations on Cylindrical Metal Vacuum Chambers in Pulsed Magnetic Fields

Description: It has been suggested that metallic vacuum chambers might be suitable for pulsed magnets operating at audio frequencies, with pulse widths nominally 1/360 sec. In the present note calculations are given for a simple model of such a system, in order to estimate the effects of field attenuation and eddy current losses. The results of the calculation may be summarized briefly as follows, where the results apply to a cylindrical chamber of non-maeyletic stainless steel, 3.0 cm in inside diameter and 0.15 an wall thickness: (1) With steady-state harmonic excitation, the field in the interior Is reduced by a factor of {approximately} 1.03 at 2,000 cps compared to dc; (2) With transient operation, the exponential decay time is about 0.021 millisecond; (3) With square-wave excitation, at 200 gauss and 180 pps, the power dissipation in the stainless steel is about 24 watts/foot, or about a factor of 20 less if half-sine-wave pulses are used instead of square pulses. These results seem encouraging enough to warrant experimental investigation of this type of vacuum chamber for pulsed steering.
Date: October 8, 1964
Partner: UNT Libraries Government Documents Department

Feedback Systems for Linear Colliders

Description: Feedback systems are essential for stable operation of a linear collider, providing a cost-effective method for relaxing tight tolerances. In the Stanford Linear Collider (SLC), feedback controls beam parameters such as trajectory, energy, and intensity throughout the accelerator. A novel dithering optimization system which adjusts final focus parameters to maximize luminosity contributed to achieving record performance in the 1997-98 run. Performance limitations of the steering feedback have been investigated, and improvements have been made. For the Next Linear Collider (NLC), extensive feedback systems are planned as an integral part of the design. Feedback requirements for JLC (the Japanese Linear Collider) are essentially identical to NLC; some of the TESLA requirements are similar but there are significant differences. For NLC, algorithms which incorporate improvements upon the SLC implementation are being prototyped. Specialized systems for the damping rings, rf and interaction point will operate at high bandwidth and fast response. To correct for the motion of individual bunches within a train, both feedforward and feedback systems are planned. SLC experience has shown that feedback systems are an invaluable operational tool for decoupling systems, allowing precision tuning, and providing pulse-to-pulse diagnostics. Feedback systems for the NLC will incorporate the key SLC features and the benefits of advancing technologies.
Date: April 12, 1999
Partner: UNT Libraries Government Documents Department

A Sampled Master Oscillator for the PEP-II B Factory

Description: A sampled phase-locked loop synchronizes the PEP-II B Factory rings to their SLAC Linac injector. The injection of both electrons and positrons into the separate rings and into their proper rf buckets requires phase shifting the linac rf with respect to the PEP rings. One of every three machine cycles provides the PEP ring an undisturbed reference while the other two thirds of the time the reference is unusable due to the injection scheme. The ring rf must be tunable about its nominal frequency for machine physics use. A sampled phase-locked loop handles the task of synchronizing the PEP-II rf to the linac while maintaining good phase noise. The input reference is sampled at 120 Hz and provides a ring rf signal with less than 0.1{degree} of rms phase jitter at 476 MHz.
Date: May 18, 1999
Partner: UNT Libraries Government Documents Department

Beam Beam Collisions at the PEP-II B Factory

Description: We describe first beam collisions at the PEP-II B Factory, a collaboration of SLAC, LBNL, and LLNL. The beams are brought close to each other in the transverse (x, y) and longitudinal (timing) directions through the use of two shared beam position monitors located 0.72 m from either side of the interaction point (IP). Transverse beam-beam deflection scans and the use of a zero-angle luminosity detector allow us to center the collisions. Beam collisions were also seen by exciting one beam at its tune frequency and observing a response in the other beam at the same frequency. Shifts in betatron tunes have also been measured. To date, the peak measured luminosity attained is 5.2 {+-} 1 x 10{sup 32} cm{sup {minus}2} s{sup {minus}1} with 786 bunches in each beam and with beam currents of 354 mA for the high-energy beam (HEB) and 680 mA for the low-energy beam (LEB).
Date: April 29, 1999
Partner: UNT Libraries Government Documents Department

Specific application for Oak Ridge National Laboratory dismantlement of Building 3004. Appendix A -- Quality assurance plan; Appendix B -- Records management plan

Description: This quality assurance (QA) plan defines the QA requirements for the dismantlement and removal of Building 3004 at Oak Ridge National Laboratory (ORNL). The building is a four-story wooden trained structure with wooden siding, which resides approximately 150 ft west of the Bulk Shielding Reactor, and only several feet away from the visitors entrance to the Graphite Reactor museum. Complete descriptions and sketches are in the Performance Specification document for this project. This project is being conducted as a non-CERCLA maintenance action. This plan is an appendix to the QA plan for the ORNL Environmental Restoration (ER) Program. ORNL/ER-225, which is the source of the project QA requirements, tailors those QA requirements to the specific needs of this project as defined in ORNL/ER-225. Project-specific description and organization are also provided in this plan. Appendix B, Records Management Plan, is included.
Date: March 1, 1997
Partner: UNT Libraries Government Documents Department

Supplemental results of the human health risk analysis for the U.S. Department of Energy draft waste management programmatic environmental impact statement

Description: This report is intended as an information supplement to the human health risk analysis performed for the US Department of Energy`s Draft Waste Management Programmatic Environmental Impact Statement for Managing Treatment, Storage, and Disposal of Radioactive and Hazardous Waste, hereinafter called the PEIS. This report provides the installation-by-installation human health risk analysis results from which the risk estimate summaries for the PEIS were drawn. Readers should bear in mind that the risk estimates presented here are the result of a program-wide (as opposed to site-specific) study. They are based on best available data; systematically applied assumptions; and professional judgment about DOE waste inventories, waste volumes generated annually, currently available treatment and disposal technologies, technical limitations of treatment, and facility capacities across the numerous installations in the DOE complex.
Date: August 1, 1995
Partner: UNT Libraries Government Documents Department

Partnering for functional genomics research conference: Abstracts of poster presentations

Description: This reports contains abstracts of poster presentations presented at the Functional Genomics Research Conference held April 16--17, 1998 in Oak Ridge, Tennessee. Attention is focused on the following areas: mouse mutagenesis and genomics; phenotype screening; gene expression analysis; DNA analysis technology development; bioinformatics; comparative analyses of mouse, human, and yeast sequences; and pilot projects to evaluate methodologies.
Date: June 1, 1998
Partner: UNT Libraries Government Documents Department